Widmar Mark R

Q: How is Widmar Mark R's win rate calculated?

We take every open-market purchase (SEC code P) we can match to a stock price, then compare the split- and dividend-adjusted price on the purchase date to the most recent close. The win rate is the share of those buys currently trading above the purchase price. Sales and share grants are not scored.

Director, Chief Executive Officer · SEC CIK 1362208

Insider at FSLR FIRST SOLAR, INC. ALB ALBEMARLE CORP

Buy track record

How this insider's open-market purchases have performed

This insider has no open-market purchases in the records we parsed, so there's no buy track record to score. Their full filing history is below.

Open-market buys

0 trades

Open-market sells

$65.49M

104 trades

Net flow

−$65.49M

Net selling

Total filings

156

transactions shown

Full transaction history

All Form 4 activity across every company, newest first

View on SEC EDGAR ↗

FSLR

FIRST SOLAR, INC.

Sell Widmar Mark R · Director, Chief Executive Officer · Open-market sale · filed May 13, 2026 ΔOwn −1.4%

Widmar Mark R sold $312K of FSLR, trimming their stake 1%.

−$312K

1,300 sh @ $240

FSLR

FIRST SOLAR, INC.

Sell Widmar Mark R · Director, Chief Executive Officer · Open-market sale · filed May 13, 2026 ΔOwn −1.4%

Widmar Mark R sold $345.3K of FSLR, trimming their stake 1%.

−$345.3K

1,500 sh @ $230

FSLR

FIRST SOLAR, INC.

Sell Widmar Mark R · Director, Chief Executive Officer · Open-market sale · filed May 13, 2026 ΔOwn −1.0%

Widmar Mark R sold $237.5K of FSLR, trimming their stake 1%.

−$237.5K

1,026 sh @ $232

FSLR

FIRST SOLAR, INC.

Sell Widmar Mark R · Director, Chief Executive Officer · Open-market sale · filed May 13, 2026 ΔOwn −2.2%

Widmar Mark R sold $526K of FSLR, trimming their stake 2%.

−$526K

2,262 sh @ $233

FSLR

FIRST SOLAR, INC.

Sell Widmar Mark R · Director, Chief Executive Officer · Open-market sale · filed May 13, 2026 ΔOwn −1.9%

Widmar Mark R sold $438.4K of FSLR, trimming their stake 2%.

−$438.4K

1,877 sh @ $234

FSLR

FIRST SOLAR, INC.

Sell Widmar Mark R · Director, Chief Executive Officer · Open-market sale · filed May 13, 2026 ΔOwn −1.5%

Widmar Mark R sold $351.8K of FSLR, trimming their stake 2%.

−$351.8K

1,498 sh @ $235

FSLR

FIRST SOLAR, INC.

Sell Widmar Mark R · Director, Chief Executive Officer · Open-market sale · filed May 13, 2026 ΔOwn −1.4%

Widmar Mark R sold $321.2K of FSLR, trimming their stake 1%.

−$321.2K

1,363 sh @ $236

FSLR

FIRST SOLAR, INC.

Sell Widmar Mark R · Director, Chief Executive Officer · Open-market sale · filed May 13, 2026 ΔOwn −0.4%

Widmar Mark R sold $94.6K of FSLR.

−$94.6K

400 sh @ $237

FSLR

FIRST SOLAR, INC.

Sell Widmar Mark R · Director, Chief Executive Officer · Open-market sale · filed May 5, 2026 ΔOwn −1.4%

Widmar Mark R sold $329.1K of FSLR, trimming their stake 1%.

−$329.1K

1,526 sh @ $216

FSLR

FIRST SOLAR, INC.

Option exercise Widmar Mark R · Director, Chief Executive Officer · Option exercise · filed May 5, 2026 ΔOwn +3.7%

+$0

3,802 sh

FSLR

FIRST SOLAR, INC.

Sell Widmar Mark R · Director, Chief Executive Officer · Open-market sale · filed Mar 17, 2026 ΔOwn −1.8%

Widmar Mark R sold $388.9K of FSLR, trimming their stake 2%.

−$388.9K

1,937 sh @ $201

FSLR

FIRST SOLAR, INC.

Option exercise Widmar Mark R · Director, Chief Executive Officer · Option exercise · filed Mar 17, 2026 ΔOwn +4.9%

+$0

4,856 sh

FSLR

FIRST SOLAR, INC.

Sell Widmar Mark R · Director, Chief Executive Officer · Open-market sale · filed Mar 10, 2026 ΔOwn −2.0%

Widmar Mark R sold $394.4K of FSLR, trimming their stake 2%.

−$394.4K

2,072 sh @ $190

FSLR

FIRST SOLAR, INC.

Sell Widmar Mark R · Director, Chief Executive Officer · Open-market sale · filed Mar 10, 2026 ΔOwn −0.5%

Widmar Mark R sold $91.4K of FSLR.

−$91.4K

480 sh @ $190

FSLR

FIRST SOLAR, INC.

Sell Widmar Mark R · Director, Chief Executive Officer · Open-market sale · filed Mar 10, 2026 ΔOwn −1.2%

Widmar Mark R sold $244K of FSLR, trimming their stake 1%.

−$244K

1,282 sh @ $190

FSLR

FIRST SOLAR, INC.

Sell Widmar Mark R · Director, Chief Executive Officer · Open-market sale · filed Mar 10, 2026 ΔOwn −1.7%

Widmar Mark R sold $324.2K of FSLR, trimming their stake 2%.

−$324.2K

1,703 sh @ $190

FSLR

FIRST SOLAR, INC.

Option exercise Widmar Mark R · Director, Chief Executive Officer · Option exercise · filed Mar 10, 2026 ΔOwn +4.1%

+$0

4,194 sh

FSLR

FIRST SOLAR, INC.

Sell Widmar Mark R · Director, Chief Executive Officer · Open-market sale · filed Mar 3, 2026 ΔOwn −7.8%

Widmar Mark R sold $1.52M of FSLR, trimming their stake 8%.

−$1.52M

7,738 sh @ $196

FSLR

FIRST SOLAR, INC.

Grant/award Widmar Mark R · Director, Chief Executive Officer · Grant/award · filed Mar 3, 2026 ΔOwn +22%

+$0

17,664 sh

FSLR

FIRST SOLAR, INC.

Sell Widmar Mark R · Director, Chief Executive Officer · Open-market sale · filed Aug 18, 2025 ΔOwn −0.1%

Widmar Mark R sold $8.7K of FSLR.

−$8.7K

47 sh @ $185

FSLR

FIRST SOLAR, INC.

Sell Widmar Mark R · Director, Chief Executive Officer · Open-market sale · filed Aug 18, 2025

Widmar Mark R sold $1.7K of FSLR.

−$1.7K

9 sh @ $186

FSLR

FIRST SOLAR, INC.

Sell Widmar Mark R · Director, Chief Executive Officer · Open-market sale · filed Aug 18, 2025 ΔOwn −0.2%

Widmar Mark R sold $28.9K of FSLR.

−$28.9K

152 sh @ $190

FSLR

FIRST SOLAR, INC.

Sell Widmar Mark R · Director, Chief Executive Officer · Open-market sale · filed Aug 18, 2025 ΔOwn −0.2%

Widmar Mark R sold $36.7K of FSLR.

−$36.7K

192 sh @ $191

FSLR

FIRST SOLAR, INC.

Sell Widmar Mark R · Director, Chief Executive Officer · Open-market sale · filed Aug 18, 2025

Widmar Mark R sold $5.8K of FSLR.

−$5.8K

30 sh @ $192

FSLR

FIRST SOLAR, INC.

Sell Widmar Mark R · Director, Chief Executive Officer · Open-market sale · filed Aug 18, 2025

Widmar Mark R sold $6.4K of FSLR.

−$6.4K

33 sh @ $193

FSLR

FIRST SOLAR, INC.

Sell Widmar Mark R · Director, Chief Executive Officer · Open-market sale · filed Aug 18, 2025

Widmar Mark R sold $4.7K of FSLR.

−$4.7K

24 sh @ $194

FSLR

FIRST SOLAR, INC.

Sell Widmar Mark R · Director, Chief Executive Officer · Open-market sale · filed Aug 18, 2025 ΔOwn −0.2%

Widmar Mark R sold $34.9K of FSLR.

−$34.9K

179 sh @ $195

FSLR

FIRST SOLAR, INC.

Sell Widmar Mark R · Director, Chief Executive Officer · Open-market sale · filed Aug 18, 2025

Widmar Mark R sold $7.1K of FSLR.

−$7.1K

36 sh @ $197

FSLR

FIRST SOLAR, INC.

Sell Widmar Mark R · Director, Chief Executive Officer · Open-market sale · filed Aug 18, 2025 ΔOwn −0.1%

Widmar Mark R sold $16.4K of FSLR.

−$16.4K

83 sh @ $198

FSLR

FIRST SOLAR, INC.

Sell Widmar Mark R · Director, Chief Executive Officer · Open-market sale · filed Aug 18, 2025 ΔOwn −0.1%

Widmar Mark R sold $11.5K of FSLR.

−$11.5K

58 sh @ $199

Frequently asked questions

How is Widmar Mark R's win rate calculated?

We take every open-market purchase (SEC code P) we can match to a stock price, then compare the split- and dividend-adjusted price on the purchase date to the most recent close. The win rate is the share of those buys currently trading above the purchase price. Sales and share grants are not scored.

Why are some buys not included in the score?

A purchase is excluded if we can't price it — for example if the ticker is missing from the filing, the company has been delisted, or the security isn't a common stock we can match to market data. Excluded counts are shown next to the scored total.

What do the 1M / 3M / 6M / 12M columns mean?

They show each purchase's return after a fixed holding period — one, three, six, and twelve months from the buy date — using split- and dividend-adjusted prices. This separates good entry timing from simply holding a long-running winner. A dash means that horizon hasn't elapsed yet for that trade, or the stock couldn't be priced at that date.

Does a high win rate mean I should copy this insider?

No. Past performance does not predict future results, sample sizes are often small, and an insider's edge in their own company doesn't transfer to yours. This is context, not a recommendation. InsiderSource is not investment advice.

Where does this data come from?

Trades come from Widmar Mark R's SEC Form 4 filings on EDGAR. Prices come from public market data and are split/dividend-adjusted. Always verify against the original filings before acting.